Physics Test - ...

Which of the following process is used to do maximum work done on the ideal gas if the gas is compressed to half of its initial volume?

A circular coil has moment of inertia \(0.8 {kg} {m}^{2}\) around any diameter and is carrying current to produce a magnetic moment of \(20 {Am}^{2}\). The coil is kept initially in a vertical position and it can rotate freely around a horizontal diameter. When a uniform magnetic field of \(4 \mathrm{T}\) is applied along the vertical, it starts rotating around its horizontal diameter. The angular speed the coil acquires after rotating by \(60^{\circ}\) will be:

Point of maximum positive displacement in a transverse wave is called:

Work is best defined as:

The energy stored in a 50 mH inductor carrying a current of 4 A will be:

A proton and an electron both are moving upward and enters into a uniform magnetic field. The direction of the magnetic field is perpendicular to the plane of paper and inward. Then both the particles will move:

When light enters from rarer medium to denser medium then its:

A body of mass \(M\) is kept on a rough horizontal surface (friction coefficient \(=\mu\) ). A person is trying to pull the body by applying a horizontal force but the body is not moving. The force by the surface on the body is \(F\), where:

In an n–type semiconductor, the electron concentration (n_o) = 10¹⁵ cm^–3 and the intrinsic carrier concentration (n_i) is 10¹⁰ cm^–3. The mean life time of minority carriers is 10^–6 sec. The steady state excess hole concentration due to constant light illumination is d_p = 4 × 10⁵ cm^–3. The steady state electron – hole recombination rate is __________.